What it does
Create new skills, modify and improve existing skills, and measure skill performance. Use when users want to create a skill from scratch, edit, or optimize an existing skill, run evals to test a skill, benchmark skill performance with variance analysis, or optimize a skill's description for better triggering accuracy.
This entry summarizes the public skill for discovery. Prefer the upstream SKILL.md for the full instruction text (we do not paste restricted or lengthy proprietary prompt bodies).
Install & usage
Claude Code (plugin marketplace)
/plugin marketplace add anthropics/skills
/plugin install example-skills@anthropic-agent-skills
Or copy this skill folder into your project:
mkdir -p .claude/skills
git clone --depth 1 https://github.com/anthropics/skills.git /tmp/anthropics-skills
cp -R /tmp/anthropics-skills/skills/skill-creator .claude/skills/skill-creator
Then ask Claude Code to use the skill-creator skill for a matching task.
Best for
Authoring, iterating, and validating new Agent Skills with eval helpers.
Hands-on test
- test_level: fully-tested
- Ran: yes
- When: 2026-11-01T01:20:00+08:00 (Asia/Shanghai)
- Result: Authored hello-echo skill, ran quick_validate.py (valid), packaged hello-echo.skill via package_skill.py with PYTHONPATH fix.
- Gotchas: package_skill.py needs PYTHONPATH/repo root or it fails importing scripts.quick_validate; PyYAML required.
Money-saving tip
Pair with Claude Pro annual ($17/mo effective vs $20 monthly per claude.com/pricing, checked 2026-11-01) or Max ($100) which includes $100/mo API credits — claim credits after 7 days on Max/Ultra/Team.
Source & license
- source_repo: anthropics/skills
- Source: https://github.com/anthropics/skills/tree/main/skills/skill-creator
- License: Apache-2.0 — https://github.com/anthropics/skills/blob/main/skills/skill-creator/LICENSE.txt
- Restrictions: Apache-2.0 examples may be redistributed with attribution. Do not redistribute Anthropic document skills (docx/pdf/pptx/xlsx) — those are source-available with redistribution bans; this entry is only for Apache-licensed example skills.